103 static void brb_init(struct bop_ring_buffer *brb)  in brb_init()  argument
105 	brb->begin = 0;  in brb_init()
106 	brb->end = 0;  in brb_init()
109 static bool brb_empty(struct bop_ring_buffer *brb)  in brb_empty()  argument
111 	return brb->begin == brb->end;  in brb_empty()
114 static unsigned int brb_next(struct bop_ring_buffer *brb, unsigned int old)  in brb_next()  argument
118 	return r >= ARRAY_SIZE(brb->bops) ? 0 : r;  in brb_next()
121 static int brb_push(struct bop_ring_buffer *brb,  in brb_push()  argument
125 	unsigned int next = brb_next(brb, brb->end);  in brb_push()
131 	if (next == brb->begin)  in brb_push()
134 	bop = brb->bops + brb->end;  in brb_push()
139 	brb->end = next;  in brb_push()
144 static int brb_peek(struct bop_ring_buffer *brb, struct block_op *result)  in brb_peek()  argument
148 	if (brb_empty(brb))  in brb_peek()
151 	bop = brb->bops + brb->begin;  in brb_peek()
156 static int brb_pop(struct bop_ring_buffer *brb)  in brb_pop()  argument
158 	if (brb_empty(brb))  in brb_pop()
161 	brb->begin = brb_next(brb, brb->begin);  in brb_pop()